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CandaceK
Junior Member

USA
4 Posts

Posted - 09/02/2007 :  22:23:48  Show Profile
Question:
A computer Consulting firm presently has bids out on three projects.
Let Ai = {awarded project i}, for i = 1,2,3, and suppose that
P(A1)=.22, P(A2)=.25,P(A3)=.28
P(A1A2)=.11 P(A1A3)=.05
P(A2A3)=.07 P(A1A2A3)=.01

1)A1A2=.36
2)A1'A2'=(A1A2)' =.64
3)A1A2A3=.22+.25+.28-.11-.05-.07+.01 =.53
4)A1'A2'A3'= .47
5)A1'A2'A3 = ?
6)A1'A2'A3 =?
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royhaas
Moderator

USA
3059 Posts

Posted - 09/03/2007 :  14:57:32  Show Profile
5) (A1'A2'A3)'=A1A2A3'
6) First complete 5), then use the rule for (A1'A2')A3.
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CandaceK
Junior Member

USA
4 Posts

Posted - 09/03/2007 :  17:47:47  Show Profile
quote:
Originally posted by royhaas

5) (A1'A2'A3)'=A1A2A3'
6) First complete 5), then use the rule for (A1'A2')A3.



How did you get (A1'A2'A3)' from A1' A2'A3?
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royhaas
Moderator

USA
3059 Posts

Posted - 09/04/2007 :  17:23:32  Show Profile
Look at 5) again; then look at what I wrote. It's the complement of 5), which you should be able to compute from the givens.
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